refactor(toolchain): 统一安装脚本中环境变量设置的格式和顺序

确保在system选项下，环境变量不会被额外写入setup中

Author: QuantumMisaka

toolchain/scripts/stage1/install_mpich.sh

@@ -179,7 +179,6 @@ export LD_LIBRARY_PATH="${pkg_install_dir}/lib":\${LD_LIBRARY_PATH}
 export LD_RUN_PATH "${pkg_install_dir}/lib":\${LD_RUN_PATH}
 export LIBRARY_PATH "${pkg_install_dir}/lib":\${LIBRARY_PATH}
 export CPATH "${pkg_install_dir}/include":\${CPATH}
-
 EOF
     fi
     cat "${BUILDDIR}/setup_mpich" >> ${SETUPFILE}

toolchain/scripts/stage3/install_elpa.sh

@@ -262,8 +262,8 @@ export PKG_CONFIG_PATH="$pkg_install_dir/lib/pkgconfig":\${PKG_CONFIG_PATH}
 export CMAKE_PREFIX_PATH="$pkg_install_dir":\${CMAKE_PREFIX_PATH}
 export ELPA_ROOT="$pkg_install_dir"
 EOF
+        cat "${BUILDDIR}/setup_elpa" >> $SETUPFILE
     fi
-    cat "${BUILDDIR}/setup_elpa" >> $SETUPFILE
     cat << EOF >> "${BUILDDIR}/setup_elpa"
 export ELPA_CFLAGS="${ELPA_CFLAGS}"
 export ELPA_LDFLAGS="${ELPA_LDFLAGS}"

toolchain/scripts/stage3/install_fftw.sh

@@ -141,9 +141,9 @@ export CPATH="$pkg_install_dir/include":\${CPATH}
 export PKG_CONFIG_PATH="$pkg_install_dir/lib/pkgconfig":\${PKG_CONFIG_PATH}
 export CMAKE_PREFIX_PATH="$pkg_install_dir":\${CMAKE_PREFIX_PATH}
 EOF
-  fi
-  # we may also want to cover FFT_SG
-  cat << EOF >> "${BUILDDIR}/setup_fftw"
+    fi
+    # we may also want to cover FFT_SG
+    cat << EOF >> "${BUILDDIR}/setup_fftw"
 export FFTW3_INCLUDES="${FFTW_CFLAGS}"
 export FFTW3_LIBS="${FFTW_LIBS}"
 export FFTW_CFLAGS="${FFTW_CFLAGS}"
@@ -156,7 +156,7 @@ export CP_LIBS="${FFTW_LIBS} \${CP_LIBS}"
 export FFTW_ROOT=${FFTW_ROOT:-${pkg_install_dir}}
 export FFTW3_ROOT=${pkg_install_dir}
 EOF
-  cat "${BUILDDIR}/setup_fftw" >> $SETUPFILE
+    cat "${BUILDDIR}/setup_fftw" >> $SETUPFILE
 fi
 cd "${ROOTDIR}"
 

toolchain/scripts/stage3/install_libxc.sh

@@ -126,8 +126,8 @@ export CPATH="$pkg_install_dir/include":\${CPATH}
 export PKG_CONFIG_PATH="$pkg_install_dir/lib/pkgconfig":\${PKG_CONFIG_PATH}
 export CMAKE_PREFIX_PATH="$pkg_install_dir":\${CMAKE_PREFIX_PATH}
 EOF
+        cat "${BUILDDIR}/setup_libxc" >> $SETUPFILE
     fi
-    cat "${BUILDDIR}/setup_libxc" >> $SETUPFILE
     cat << EOF >> "${BUILDDIR}/setup_libxc"
 export LIBXC_CFLAGS="${LIBXC_CFLAGS}"
 export LIBXC_LDFLAGS="${LIBXC_LDFLAGS}"